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Consolidated standards of reporting trials diagram.
COPD = chronic obstructive pulmonary disease.
aReasons: 23 lost to follow-up; 1 no inhalers; 4 did not bring inhalers to demonstrate.
bReasons: 13 lost to follow-up; 3 no inhalers; 1 did not answer question.
cReasons: 8 lost to follow-up; 1 no inhalers; 3 did not bring inhalers to demonstrate.
dReasons: 8 lost to follow-up; 1 no inhalers; 2 did not answer question.
